4.1.3 Giant Covalent substances Flashcards
What is the structure and bonding of diamond?
Diamond is a form of pure carbon arranged in a giant lattice. It has very strong covalent bonds in a tetrahedral structure. Every carbon atom makes 4 covalent bonds. It is a giant covalent substance.
Why is diamond’s sublimation point so high?
Diamond is a giant molecular substance with a giant tetrahedral structure with lots of very strong covalent bonds arranged in a giant lattice. It takes lots of energy to break the strong covalent bonds, therefore it has an extremely high sublimation point.
Why is diamond one of the hardest substances?
Diamond is a giant molecular substance with a giant tetrahedral structure with lots of very strong covalent bonds arranged in a giant lattice. It takes lots of energy to break the strong covalent bonds, therefore it is very hard.
What is a use of diamond?
Cutting.
Why can’t diamond conduct electricity?
There are no free moving charged particles. All atoms are neutral and all electrons are stuck inside an atom or a bond.
What is the structure and bonding of graphite?
Graphite is a form of pure carbon arranged in a giant lattice. There are layers of hexagons of carbon atoms and strong covalent bonds between them. Every carbon atom makes 3 covalent bonds. There are weak intermolecular forces between the layers. There are delocalised electrons inside each layer. Graphite is a giant covalent substance.
Why does graphite sublime at a high temperture?
Graphite is a giant molecular substance with a giant structure with lots of very strong covalent bonds arranged in a giant lattice. It takes lots of energy to break the strong covalent bonds, therefore it has an extremely high sublimation point.
Why is graphite soft?
The layers of carbon atoms can slide over each other, therefore graphite is soft.
What is a use of graphite?
Solid lubricant.
Why does graphite conduct electricty?
The delocalised electrons are charged and free to move.
What is the structure and bonding of Silicon dioxide?
Silicon dioxide is a giant covalent substance arranged in a giant lattice with lots of very strong covalent bonds. Each silicon atom makes 4 covalent bonds. Each oxygen atom makes makes 2 covalent bonds. It has a giant tetrahedral structure.
